Investigation of solid catalysts for glycolysis of polyethylene terephthalate

Zhu, Min-Li; Li, Shan; Li, Zengxi; Lü, Xingmei; Zhang, Suojiang

doi:10.1016/j.cej.2012.01.068

Cited by 94 publications

(64 citation statements)

References 36 publications

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“…The catalyst 10-ST/Hβ exhibits uniform particles with 30 nm diameter. As demonstrated by EDS mapping, homogeneous distribution and density of different elements are evident on the entire surface of 10-ST/Hβ [34]. This is consistent with XRD, IR and, BET analyses, indicating that ST species on the surface of Hβ are highly dispersed.…”

Section: Fig 2 Xrd Profiles Of Catalysts and Partial Magnification supporting

confidence: 83%

Preparation and Characterization of SO42-/TiO2-HBeta for Selective Conversion of 1-Methylnaphthalene

Sun¹,

Huang²,

Zhu³

et al. 2017

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In this study, new types of SO4 2-/TiO2-HBeta (ST/Hβ) catalysts are synthesized and characterized by XRD, IR, N2 adsorption-desorption, ICP-OES, SEM, and NH3-TPD methods. Conversion of 1-methylnaphthalene is carried out in a fixed-bed system. Based on the study's results, the catalysts ST/Hβ showed uniform SO4 2-/TiO2 (ST) loading, high surface area, and sufficient mild acid sites. When ST content increased, the amount of strong acid sites and by-products decreased. Under atmospheric pressure, catalyst 15-ST/Hβ showed a catalytic performance of 74.1 % conversion and 97.4 % selectivity.

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Section: Fig 2 Xrd Profiles Of Catalysts and Partial Magnification supporting

confidence: 83%

Preparation and Characterization of SO42-/TiO2-HBeta for Selective Conversion of 1-Methylnaphthalene

Sun¹,

Huang²,

Zhu³

et al. 2017

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“…Therefore, various catalysts for the glycolysis of PET have been investigated and can be classified into three categories: 1) Metal salts, such as acetates [4,10] (activity order as Zn 2þ > Mn 2þ > Co 2þ > Pb 2þ ), chlorides [11] (activity order as Zn 2þ > Nd 3þ > Li þ > Fe 3þ > Mg 2þ ), titanium phosphate [12], carbonates and sulphates [13] (activity order as Zn 2þ > Na þ > K þ ); 2) Ionic liquids [14e16]; 3) Heterogeneous catalysts, such as metal oxides [17,18], zeolite [19], hydrotalcites [20] and solid acids [21]. Since the complexity of mass transfer, the efficiency of heterogeneous catalyst is relatively low.…”

Section: Introductionmentioning

confidence: 99%

Sodium titanium tris(glycolate) as a catalyst for the chemical recycling of poly(ethylene terephthalate) via glycolysis and repolycondensation

Wang

et al. 2015

Polymer Degradation and Stability

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“…Among all different recycling techniques including chemical, mechanical, and thermal recycling, the most suitable method based on "Sustainable Development" is the chemical recycling, simply because it yields raw materials and other value‐added crops from polymer waste . The chemical degradation processes of PET waste are frequently demonstrated as follows: hydrolysis , glycolysis , methanolysis , aminolysis , ammonolysis , and other processes . Glycolysis and methanolysis are commercially used; however, the most interesting one is the glycolysis method that yields related monomers or raw materials that could be reused for plastics production or other advanced materials .…”

Section: Introductionmentioning

confidence: 99%

Optimization of phthalic/maleic anhydride-endcapped PET oligomers using response surface method

2013

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Poly(ethylene terephthalate) (PET) from off‐grades of industrial manufacturers was partially and thoroughly depolymerized in order to synthesize PET oligomers and bis(hydroxyethyl) terephthalate (BHET), respectively. Design of experiments and analysis of variance (ANOVA) were applied for optimization of samples. Effects of reaction time, volume of glycol, catalyst concentrations, and particle size of off‐grade PET were investigated. The optimal conditions to synthesize PET oligomers (3–8 repeating units) were glycol/PET molar ratio of 1, a weight ratio (catalyst to PET) of 0.5 wt%, using granule‐shape. On the other hand, a reaction time of 180 min, a weight ratio (catalyst to PET) of 0.25 wt%, and glycol/PET molar ratio of 5 were obtained as the suitable conditions of BHET production. Then, endcapped PET oligomers, as a compatibilizer for preparing PET nanocomposites, were produced via reaction between maleic anhydride/phthalic anhydride (MA/PhA) composition. The combination of reaction time of 106 min and PhA/MA molar ratio of 0.85 produced the best results based on d‐spacing and peak shift of nanocomposite samples. Moreover, the reaction of MA and BHET from glycolyzation of PET was successfully performed at 160°C and 190°C for 8 h. The optimum conditions were compared with a synthesized PET. POLYM. ENG. SCI., 54:417–429, 2014. © 2013 Society of Plastics Engineers

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Investigation of solid catalysts for glycolysis of polyethylene terephthalate

Cited by 94 publications

References 36 publications

Preparation and Characterization of SO42-/TiO2-HBeta for Selective Conversion of 1-Methylnaphthalene

Preparation and Characterization of SO42-/TiO2-HBeta for Selective Conversion of 1-Methylnaphthalene

Sodium titanium tris(glycolate) as a catalyst for the chemical recycling of poly(ethylene terephthalate) via glycolysis and repolycondensation

Optimization of phthalic/maleic anhydride-endcapped PET oligomers using response surface method

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